~~~ const MongoClient = require('mongodb').MongoClient; var url = 'mongodb://localhost:27017/'; console.time('start') MongoClient.connect(url, { useNewUrlParser: true },(err,client)=>{ if(err) throw err; client.db('my-test').collection("user").insertOne({name:"chengchao"},(err,result)=>{ if(!err) console.log("增加成功") client.close() console.timeEnd("start") }); }) ~~~